Sterling Overnight Index Average Rate in the United Kingdom remained unchanged at 3.73 percent on Wednesday December 31. Sterling Overnight Index Average Rate in the United Kingdom averaged 2.83 percent from 1997 until 2025, reaching an all time high of 8.61 percent in April of 1998 and a record low of 0.04 percent in December of 2020. source: Bank of England

United Kingdom Sterling Overnight Index Average Rate

The Sterling Overnight Index Average (SONIA) is a widely used interest rate benchmark and the reference rate for sterling Overnight Indexed Swaps (OIS). SONIA is a measure of the rate at which interest is paid on sterling short-term wholesale funds in circumstances where credit, liquidity and other risks are minimal. On each London business day, SONIA is measured as the trimmed mean, rounded to four decimal places, of interest rates paid on eligible sterling denominated deposit transactions.